Pneumatic tire

Abstract

Provided is a pneumatic tire capable of improving noise performance and wet performance while maintaining steering stability. Disclosed is a pneumatic tire wherein: center blocks 20 and shoulder blocks 21 are partitioned by a circumferential-direction groove 10 extending in the tire circumferential direction, a plurality of inner slanted grooves 11 that communicate with the circumferential-direction groove 10 while slanting in one direction with respect to the tire circumferential direction, and a plurality of outer slanted grooves 12 that communicate with the inner slanted grooves 11 while slanting in another direction with respect to the tire circumferential direction; the pitch of each repeating element consisting of these grooves and blocks changes along the tire circumferential direction; the circumferential-direction groove 10 is constituted by a plurality of wide-width parts 10A and a plurality of narrow-width parts 10B arranged alternately in the tire circumferential direction;the inner slanted grooves 11 communicate with the wide-width parts 10A; and, the smaller the pitch of the repeating element is, the smaller the slanting angle theta formed between the tire circumferential direction and an imaginary line L connecting the respective centers of opening ends of a pair of said inner slanted grooves 11, 11 that is in communication with said wide-width part 10A.

Description

technical field [0001] The present invention relates to a pneumatic tire, and more specifically, to a pneumatic tire capable of improving running performance on muddy roads while maintaining noise performance. Background technique [0002] Pneumatic tires used for driving on muddy terrain, snowy roads, sandy terrain, etc. (hereinafter, collectively referred to as "muddy terrain, etc.") generally use horizontal grooves and block patterns with many edge components. And the tread pattern with large groove area. In such tires, traction performance is obtained by biting into mud, snow, sand, etc. ), thereby improving the driving performance on muddy ground (mud performance). However, in such a pattern, since the block pattern is the main part, pattern noise is likely to be generated, and since the lateral groove is the main part, the generated noise is easily emitted to the outside of the vehicle through the lateral groove, so it is difficult to maintain sufficient noise perfor...

AI Technical Summary

Problems solved by technology

However, even with such a pattern, it may not be possible to say that mud performance and noise performance are fully balanced, and further improvement is required.

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